European Society of Cardiology definition of heart failure
| Criteria I and II should be fulfilled in all cases. |
| I. Symptoms of heart failure (at rest or during exercise) |
| and |
| II. Objective evidence (preferably by echocardiography) of cardiac dysfunction (systolic and/or diastolic) (at rest) |
| and (in cases where the diagnosis is in doubt) |
| III. Response to treatment directed towards heart failure |